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Finding the Fourth Proportional to 303,146.15, 454,720.80 and 78,490.85

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Solution

The fourth proportional to 303,146.15, 454,720.80 and 78,490.85 is: 117,736.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,146.15 : 454,720.80 = 78,490.85 : x
  2. Step 2: Convert to fraction form
    303,146.15/454,720.80 = 78,490.85/x
  3. Step 3: Cross multiply
    303,146.15x = 454,720.80 × 78,490.85
  4. Step 4: Simplify right side
    303,146.15x = 35,691,422,104.68
  5. Step 5: Solve for x
    x = 35,691,422,104.68/303,146.15
  6. Step 6: Final answer
    x = 117,736.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.